These teams have met four times in the last decade and Stade FranÃ§ais have won every time. In fact, going even further back, the Parisians have not lost in their last five visits to Grenoble.

But considering Stade FranÃ§ais's form away from the capital in recent years, Grenoble - under the guidance of former Stade stalwart Fabrice Landreau - will fancy their chances in their first top division home game in seven years.

Both clubs have a victory and a defeat under their belts this season but Stade FranÃ§ais have won just one of their last 20 games on the road!

Grenoble sharpshooter Valentin Courrent starts at scrum-half while Shaun Sowerby, who started his career in France with Stade, is at number eight.

Felipe Contepomi is at ten for the visitors in the absence of the injured Jules Plisson.

Previous result Stade FranÃ§ais won 28-8 in 2005. Prediction: Grenoble have made a decent start and will be up for it at home. Grenoble by a whiskerKick-off: 20.50 (18.50 GMT)Referee: Jean-Luc Rebollal

The co-leaders face off in the Basque country where Biarritz seem to have rediscovered some form. It's been four years since BO started the season with back-to-back wins. Counting their Amlin Challenge Cup title of last season, the Basques are on a winning streak not seen for ages.

Toulouse have won the last eight games between these sides in all competitions and six of the last eight games in Biarritz. But the defending champions struggled in their opening games, needing late surges from their bench to win at home against Castres and Mont-de-Marsan.

Toulouse have been uncharacteristically indisciplined and will need to tighten up to maintain their unbeaten record.

Former Crusaders and Leinster fly-half Matt Berquist has recovered from a hamstring tear and will play for the Biarritz youth team this weekend in the hope of breaking into the senior side in the coming weeks.

Toulouse will wait until late on Friday to make a decision regarding Luke McAlister, who injured a calf muscle last week.

Results last season: Toulouse won 24-0 at home and 20-15 in BiarritzPrediction: Toulouse seem to still be in 'pre-season mode'. Biarritz by three pointsKick-off: 15.00 (13.00 GMT)Referee: Mathieu Raynal

Castres Olympique v Aviron BayonnaisStade Pierre Antoine, Castres

Castres play their second consecutive game at home, where they have lost just once in two years.

It's been a frustrating start to the season for CO, who lost in Toulouse in the dying minutes and threw away a winning bonus point against Grenoble last week by conceding a late try while playing with 14 men.

Bayonne have impressed on defence so far having given up just two tries and three penalties in two games. Last week's home win over Stade FranÃ§ais, thanks to the accurate kicking of Jacques-Louis Potgeiter, would have reassured the Basques after the fly-half failed dismally against Clermont on the opening weekend.

However, Bayonne have yet to score a try and considering Castres' defensive record they might go a third week without a five pointer.

Benjamin Boyet makes his return to the extended Bayonne squad from injury this week while former Hurricanes fly-half Daniel Kirkpatrick could make his debut for Castres.

Results last season: Castres won 31-19 at home; 16-16 draw in BayonnePrediction: Castres have won their last three home games against Bayonne. Castres by nine pointsKick-off: 18.30 (16.30 GMT)Referee: Laurent Cardona

The 2010 champions host the 2009 champions. But the comparisons end there as Perpignan have had a miserable time over the past two years and, so far, not much has gone right this season.

Win-less in two games and yet to cross the whitewash, the Catalans are already in trouble. Fortress Marcel Michelin, where Clermont have not lost since 2009, is not the place to expect to get their season back on track, especially since Clermont have the best defence in the league this term.

Title favourites Clermont play their first game at home having claimed victory in Bayonne and a losing bonus point in Montpellier last week.